the grid is loading all storages but when the user selects one row on grid then press delete button on grid toolbar this exception raised :

The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'Ext.Direct.Mvc.DirectResult DeleteStorage(Int32)' in 'CrmMvc.Controllers.StorageController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
Parameter name: parameters.